struct thandle *th)
{
struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
struct osd_thandle *oh;
uint64_t oid;
ENTRY;
dmu_tx_hold_write(oh->ot_tx, oid, pos, size);
- RETURN(0);
+ /* dt_declare_write() is usually called for system objects, such
+ * as llog or last_rcvd files. We needn't enforce quota on those
+ * objects, so always set the lqi_space as 0. */
+ RETURN(osd_declare_quota(env, osd, obj->oo_attr.la_uid,
+ obj->oo_attr.la_gid, 0, oh, true, NULL,
+ false));
}
static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
lnb->rc = 0;
lnb->lnb_file_offset = off;
- lnb->offset = bufoff & ~CFS_PAGE_MASK;
+ lnb->lnb_page_offset = bufoff & ~CFS_PAGE_MASK;
lnb->len = thispage;
lnb->page = kmem_to_page(dbp[i]->db_data +
bufoff);
plen = min_t(int, sz_in_block, CFS_PAGE_SIZE);
lnb[i].lnb_file_offset = off;
- lnb[i].offset = 0;
+ lnb[i].lnb_page_offset = 0;
lnb[i].len = plen;
lnb[i].rc = 0;
if (sz_in_block == bs)
plen = min_t(int, sz_in_block, CFS_PAGE_SIZE);
lnb[i].lnb_file_offset = off;
- lnb[i].offset = 0;
+ lnb[i].lnb_page_offset = 0;
lnb[i].len = plen;
lnb[i].rc = 0;
lnb[i].dentry = NULL;
return 0;
}
+/* Return number of blocks that aren't mapped in the [start, start + size]
+ * region */
+static int osd_count_not_mapped(struct osd_object *obj, uint64_t start,
+ uint32_t size)
+{
+ dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)obj->oo_db;
+ dmu_buf_impl_t *db;
+ dnode_t *dn;
+ uint32_t blkshift;
+ uint64_t end, blkid;
+ int rc;
+ ENTRY;
+
+ DB_DNODE_ENTER(dbi);
+ dn = DB_DNODE(dbi);
+
+ if (dn->dn_maxblkid == 0) {
+ if (start + size <= dn->dn_datablksz)
+ GOTO(out, size = 0);
+ if (start < dn->dn_datablksz)
+ start = dn->dn_datablksz;
+ /* assume largest block size */
+ blkshift = SPA_MAXBLOCKSHIFT;
+ } else {
+ /* blocksize can't change */
+ blkshift = dn->dn_datablkshift;
+ }
+
+ /* compute address of last block */
+ end = (start + size - 1) >> blkshift;
+ /* align start on block boundaries */
+ start >>= blkshift;
+
+ /* size is null, can't be mapped */
+ if (obj->oo_attr.la_size == 0 || dn->dn_maxblkid == 0)
+ GOTO(out, size = (end - start + 1) << blkshift);
+
+ /* beyond EOF, can't be mapped */
+ if (start > dn->dn_maxblkid)
+ GOTO(out, size = (end - start + 1) << blkshift);
+
+ size = 0;
+ for (blkid = start; blkid <= end; blkid++) {
+ if (blkid == dn->dn_maxblkid)
+ /* this one is mapped for sure */
+ continue;
+ if (blkid > dn->dn_maxblkid) {
+ size += (end - blkid + 1) << blkshift;
+ GOTO(out, size);
+ }
+
+ rc = dbuf_hold_impl(dn, 0, blkid, TRUE, FTAG, &db);
+ if (rc) {
+ /* for ENOENT (block not mapped) and any other errors,
+ * assume the block isn't mapped */
+ size += 1 << blkshift;
+ continue;
+ }
+ dbuf_rele(db, FTAG);
+ }
+
+ GOTO(out, size);
+out:
+ DB_DNODE_EXIT(dbi);
+ return size;
+}
+
static int osd_declare_write_commit(const struct lu_env *env,
struct dt_object *dt,
struct niobuf_local *lnb, int npages,
struct thandle *th)
{
struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
struct osd_thandle *oh;
uint64_t offset = 0;
uint32_t size = 0;
- int i;
+ int i, rc, flags = 0;
+ bool ignore_quota = false, synced = false;
+ long long space = 0;
ENTRY;
LASSERT(dt_object_exists(dt));
* skipped in osd_write_commit(). Hence we skip pages
* with lnb_rc != 0 here too */
continue;
+ /* ignore quota for the whole request if any page is from
+ * client cache or written by root.
+ *
+ * XXX we could handle this on per-lnb basis as done by
+ * grant. */
+ if ((lnb[i].flags & OBD_BRW_NOQUOTA) ||
+ !(lnb[i].flags & OBD_BRW_SYNC))
+ ignore_quota = true;
if (size == 0) {
/* first valid lnb */
offset = lnb[i].lnb_file_offset;
dmu_tx_hold_write(oh->ot_tx, obj->oo_db->db_object, offset,size);
+ /* estimating space that will be consumed by a write is rather
+ * complicated with ZFS. As a consequence, we don't account for
+ * indirect blocks and quota overrun will be adjusted once the
+ * operation is committed, if required. */
+ space += osd_count_not_mapped(obj, offset, size);
+
offset = lnb->lnb_file_offset;
size = lnb->len;
}
- if (size)
+ if (size) {
dmu_tx_hold_write(oh->ot_tx, obj->oo_db->db_object, offset,size);
+ space += osd_count_not_mapped(obj, offset, size);
+ }
dmu_tx_hold_sa(oh->ot_tx, obj->oo_sa_hdl, 0);
oh->ot_write_commit = 1; /* used in osd_trans_start() for fail_loc */
- RETURN(0);
+ /* backend zfs filesystem might be configured to store multiple data
+ * copies */
+ space *= osd->od_objset.os->os_copies;
+ space = toqb(space);
+ CDEBUG(D_QUOTA, "writting %d pages, reserving "LPD64"K of quota "
+ "space\n", npages, space);
+
+retry:
+ /* acquire quota space if needed */
+ rc = osd_declare_quota(env, osd, obj->oo_attr.la_uid,
+ obj->oo_attr.la_gid, space, oh, true, &flags,
+ ignore_quota);
+
+ if (!synced && rc == -EDQUOT && (flags & QUOTA_FL_SYNC) != 0) {
+ dt_sync(env, th->th_dev);
+ synced = true;
+ CDEBUG(D_QUOTA, "retry after sync\n");
+ flags = 0;
+ goto retry;
+ }
+
+ /* we need only to store the overquota flags in the first lnb for
+ * now, once we support multiple objects BRW, this code needs be
+ * revised. */
+ if (flags & QUOTA_FL_OVER_USRQUOTA)
+ lnb[0].flags |= OBD_BRW_OVER_USRQUOTA;
+ if (flags & QUOTA_FL_OVER_GRPQUOTA)
+ lnb[0].flags |= OBD_BRW_OVER_GRPQUOTA;
+
+ RETURN(rc);
}
static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
__u64 start, __u64 end, struct thandle *handle)
{
struct osd_object *obj = osd_dt_obj(dt);
+ struct osd_device *osd = osd_obj2dev(obj);
struct osd_thandle *oh;
__u64 len;
ENTRY;
/* ... and we'll modify size attribute */
dmu_tx_hold_sa(oh->ot_tx, obj->oo_sa_hdl, 0);
- RETURN(0);
+ RETURN(osd_declare_quota(env, osd, obj->oo_attr.la_uid,
+ obj->oo_attr.la_gid, 0, oh, true, NULL,
+ false));
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff